free radical

英 [ˌfriː ˈrædɪkl]

美 [ˌfriː ˈrædɪkl]

n.  自由基; 游离基

医学化学

牛津词典

noun

• 自由基；游离基
  an atom or group of atoms that has an electron that is not part of a pair, causing it to take part easily in chemical reactions. Free radicals in the body are thought to be one of the causes of diseases such as cancer.

柯林斯词典

• 自由基;游离基
  Free radicalsare atoms that contain one or more unpaired electrons. Free radicals are believed to be a cause of ageing, heart disease, and some cancers.

英英释义

noun

• an atom or group of atoms with at least one unpaired electron
  1. in the body free radicals are high-energy particles that ricochet wildly and damage cells
  Synonym:radical

双语例句

• The high quality high-solids hydroxyl acrylic resins with low viscosity were prepared by free radical polymerization.
  合成的改性物对羟基树脂有极好的相容性，可以与羟基丙烯酸树脂配成涂料。
• The anti-oxidizing function can prevent the aging of skin caused by free radical.
  具有抗氧化功能，可抵御自由基所造成的肌肤老化。
• Abstract: A water dispersed SBS grafted polymer was synthesized by free radical polymerization.
  文摘：采用自由基接枝共聚的方法合成了亲水性SBS接枝丙烯酸共聚物，同时进行了结构表征。
• Fluorine-containing polymer-base fatliquoring agent was prepared through free radical copolymerization with maleic anhydride and natural oil.
  通过动、植物油与马来酸酐共聚，然后用十二氟庚醇和高级脂肪醇酯化，合成了含氟聚合物加脂剂。
• The paper reviewed the modification of chitosan by free radical polymerization and atom transfer radical polymerization ( ATRP), emphasized the application of ATRP on graft copolymerization of chitosan.
  综述了普通自由基聚合和原子转移自由基聚合（ATRP）反应对壳聚糖及其衍生物进行修饰改性的研究现状。着重介绍了ATRP技术在壳聚糖接枝改性方面的应用。
• The Effect of Dioxin on Expressions of AhR Genes and the Free Radical
  二恶英中毒对AhR基因表达和自由基水平的影响
• Vitamin E is the main body of biological free radical scavenger and antioxidant one.
  维生素E是体内最主要的生物自由基清除剂和抗氧化剂之一。
• The oxygen free radical scavenging activities and anti-lipoprotein oxidative effects of green tea polysaccharides were studied.
  研究绿茶多糖体外清除氧自由基与抗脂蛋白氧化作用。
• Protein helps repair cells that have suffered free radical damage.
  蛋白质帮助修复被自由基破坏的受损细胞。
• Secondary inflammatory reaction and free radical damage existed in the tissue around intracerebral hemorrhage.
  脑出血后血肿周围存在继发炎性反应与自由基损伤。